Furnace roof structure



Sept. 30, 1952 s. LONGENECKER 2,612,124

- FURNACE ROOF STRUCTURE Filed March 17, 1949 I 7 Sheets-Sheet l INVENTOR. Lew S. Longenec/rer ",i:i@"k' 30EH5 3o p 1952 L. S. LONGENECKER 2,612,124

FURNACE ROOF STRUCTURE Filed March 17 1949 7 Sheets-Sheet 5 INVENTOR.

' Levi .SiLongerzec/rer E5. 10 EH11 Sept. 30', "1952 L. s. LONGENECKER FURNACE ROOF STRUCTURE 7 Sheets-Sheet 4 Filed March 17, 1949 INVENTOR.

Levi .S. Langenec/rer lol Sept. 30, 1952 s. LONGENECKER FURNACE ROOF STRUCTURE '7 Sheets-Sheet 5 Filed March 17 1949 f INVENTOR.

Ley/ S. L ongenec/rer Sept. 30, 195 2 L. a LONGENECKER 2,612,124

FURNACE ROOF STRUCTURE Filed March 17, 1949 7 Sheets-Sheet 6 QINVENTYOR. Lew SLongenea/rer L. s. LONGE'NECKER FURNACE ROOF STRUCTURE Sept 30, 1952 Filed March 17', 1949 E: LL-..

lll| llrll l INVENTOR 5. Longenecker 7 Sheets-Sheet '7 Patented Sept. 30, 1952 Application March 17, 1949,-Serial No. 81,889

I (Cl. 11099) 17 Claims.

This invention relates to furnace roof struc-.

tures and more particularly to structures in which the refractory roof blocks are suspended in groups or bundles from overhead support beams.

In Patent 1,913,168 issued to me on June 6, 1933,-

I disclose a furnace roof structure of this type in which the refractory roof blocks are individually supported by interengaging sections of cantilever beams which are anchored to and extend in opposite directions from overhead I-beam supports. The group or bundle of blocks supported by one such cantilever beam abuts and also counterbalances the group or bundle supported by the opposed cantilever beam; each such cantilever beam having its own support by means of which itis anchored to the I-beam.

In Patent 2,126,901 issuedto me on August 16, 1938, I disclose the same type of cantilever suspension, but in this patenteach roof block is provided with an upwardly projecting extension for receiving its metal hanger section which forms part of the cantilever beam by which such block is supported. These upwardly projecting extensions place these metal hanger sections further from the heat of the furnace chamber than in the construction shown in Patent 1,913,168.

One object of this invention is to produce a furnace roof structure utilizing the type-of cantilever suspension disclosed in my said patents but in which the metal hanger sections of such suspension are spaced much further from the heat of the furnace chamber than even those of the structure of Patent 2,126,901.

Another object is to produceimproved refractory elements for a suspended furnace roof structure.

Another object is to produce an improved onepiece metal hanger for supporting two'opposed cantilever beams from an overhead I-beamu Another object is to produce'a cast metal hanger for supporting from the lower flange'of an overhead I-beam an assembly comprising 013- positely extending cantilever beams and refractory blocks supported thereby, which is shiftable laterally of such beam flange to compensate for crookedness of the beam and thickness variations in such refractory blocks.

A further object is to produce a three-part refractory element in which such parts are so interlocked that they can be handled asa single unit.

A further, object is to produce an improved suspended interlocking furnace roof structure of the general type disclosed in my said-patents, but in which the refractory portions of the roof structure can be produced more cheaply than those of either of said patents and in which the cantilever support beams are better protected from furnace chamber temperatures than in the structures'of my said patents. v

Another object is to produce an improved roof refractory of the interlocking block type such as broadly disclosed in my said prior patents. Y

These and other objects I attain by means of the structure described in the specification and illustrated in the drawings accompanying and forming part of this application. 7

In the drawings: v

Figure 1 is an end elevational view ofa furnace roof structure embodying this invention;

Fig. 2 is a top plan view of that portion of the furnace structure disclosed in Fig. 1;

Fig. 3 is an elevational view taken on line IIIIII of Fig. 1;

Figs. 4 and 5 are isometric perspective views of one of the roof blocks of this invention looking toward opposite sides thereof;

Fig. 6 is an isometric perspective view of a ceramic hanger blockof this invention;

Fig. 7 is an isometric perspective view of an assembly of two roof blocks and one ceramic hanger and comprises one complete refractory unit-the parts of which are interlocked and capable of being handled as one element;

Fig. 8 is a top plan view of a one-piece cast metal hanger element for supporting two opposed cantilever beams from an overhead I-beam;

Fig. 9 is a front elevational view of such hanger element;

Fig. 10 is a sectional View taken on line X-; of Fig. 8;

Fig. 11 is an end view looking from line XI-XI on Fig. 8;

Fig. 12 is a view similar to Fig. 9 of the hanger element and shows in place therein upper, por

tions of four ceramic hanger tiles such as disclosed in Fig. 6;

Fig. 13 is an enlarged view of a portion of Fig. 1;

Fig. 14 is a view looking towardthe left side of Fig. 13; r

Figs. 15, 16 and 1'7 are detail views of one of the metal hanger members such as form a single element or section of one of the cantilever beams utilized in the structure of this invention. These views include the upper portion of a ceramic hanger tile of Fig. 6 and show the application of such hanger member to such a tile;

Fig. 18 is an isometric perspective view of a shouldered roof block used in my roof structure;

Fig. 19 is an isometric perspective view of a metal spacing member such as used above one such shouldered block;

Fig. 20 is a sectional view taken on line XX-XX of Fig. 1;

Fig. 21 is a top plan view in modified form of a metal hanger for supporting or anchoring opposed cantilever beams to an overhead I-beam;

Fig. 22 is a front elevational view of the hanger of Fig. 21;

Fig. 23 is an isometric perspective view of a ceramic tile for use in connection with the hanger member of Figs. 21 and 22;

Fig. 24 is an isometric perspective view of an assembly comprising a hanger tile of Fig. 23 and four roof tiles of Fig. 4 or 5;

Fig. 25 is a view similar to Fig. 13 but shows the hanger of Figs. 21 and 22 and two assemblies such as disclosed in Fig. 24;

Fig. 26 is a view looking toward the left of Fig. 25; Y

Fig. 27 is a top plan view of the roof portion shown in Fig. 25; and I Fig. 28 is a view taken on line XXVIII-XXVIII of Fig. 25.

By referring to Figs. 1, 2 and 3 of the drawings, it will be seen that the roof structure of this invention as in the structures of my said patents makes use of opposed sectional cantilever beams for supporting the refractories from I-beams forming part of the furnace superstructure.

In such patents, each refractory unit comprises but one regular size refractory roof block and this is independentlysuspended by one element of a sectional cantilever beam. In the present structure, howeveneach refractory unit comprises an assembly of three refractory blocks which can be handled as a unit and includes two half size roof blocks and a hanger block.

In the present structure, eachpair of opposed sectional cantilever beams has its fixedends attached to a single cast metal member which is supported on the lower flange of an overhead I-beam and is constructed so that it can be adjusted laterally of such flange in order that the refractories supported by and depending from such cantilever beams anchored thereto can be shifted laterally so as to compensate for any crookedness in such I-beam and thickness variations in such refractories.

In the structures of my said prior patents, the refractory units supported by the sections at the fixed ends of the cantilever beams abut one against the other. In the present structure, however, such units abut'against opposite side faces of the group of four refractory units located below the I-beam and which are directly engaged by the one-piece cast metal hanger memberitself.

The roof structure of this invention in its preferred form comprisesibut two types of main refractory blocks (a) roof blocks 39 of Figs. 4 and 5 which show opposite sides of the same block and (b) hanger blocks 3| of Fig. 6.

The free ends of the aligned cantilever beams are tied together by means of metal tie members 32 (Fig. 19) and the spaces below the same and between the end refractories of the bundles supported by such cantilever beams are filled by two oppositely positioned shouldered refractory blocks 33 shown in Fig. 18.

Roof blocks Roof blocks in reality are but half blocks since they preferably are but about 5% inches wide. They, however, have a normal length of 10 inches and a normal thickness of 3 inches.

As shown in Figs. 4 and 5, which are views of the same block showing opposite sides thereof, it will be seen that such block in one of its wide faces, is provided with a generally triangular depression 34 and on its opposite wide face with a generally triangular projection 35 of the same size, shape and relative location as such depres sion.

When those blocks are assembled into units with hanger blocks 3| as shown in Fig. 7 and arranged in abutting relation to form the bundles of Figs. '1 and 2, the projections 35 and depressions 34 of each such assembly will interlock with those of reverse form in opposite sides thereof.

Since the apices of these generally triangular portions 34 and 35 are disposed adjacent the tops of the blocks, the interlocking effect occasioned by the meshing of the projections and depressions of abutting blocks is as effective as the interengaging projections and depressions of the block disclosed in my Patent 2,126,901.

As an alternative construction, one wide face of each roof block can be provided with a triangular projection which in its entirety is located between and spaced from the long edges of one of the wide faces, and the opposite wide face can be provided with a depression which corresponds in shape, size and location to such projections. The form shown in the drawings, however, is preferable since it is easier to produce and therefore cheaper.

Each roof block 30 adjacent its top and imme- K diately above the apex of depression 34 and projection 35 is so formed that when two blocks 36 are placed in abutting relation, as shown in Fig. '7, a two-part pocket is provided (half in one block and half in the other) to receive and engage the lower end of'a: hanger block 3|.

The construction of hanger blocks 3| is preferably such that it is'necessary to slide the roof blocks into engagement with the hanger blocks and to do this from opposite directions. This is so because pockets 36- -36 formed in opposite long sides of hanger blocks 3| have their open ends facing in opposite directions.

Roof block 33 in its narrow side immediately above projection 35 and depression 34 is formed with two portions having faces 31 and 38 which are inwardly offset with relation to each other and to the face of the remainder or major part of the adjacent narrow face of the block, thus forming a shelf 39 and a ledge 40.

Immediately behind shelf 39, the block is provided with a downwardly extending groove 4| having a rounded bottom which connects the back of shelf 39 with the bottom of offset wall 38.

The planes of faces 31 and 38 preferably parallel the plane of the major part of the adjacent narrow face of the block. Shelf 39 and groove 4i both extend from'one wide face to the opposite wide face while ledge 40, which overhangs groove 4|, terminates short of the wide side face having triangular projection 35 thereon as shown at 42 (Figs. 4 and 5) for a purpose to be later described in connection with hanger block 3|.

Hanger blocks Each hanger block 3| is designed to engage and support two roof blocks 30 to form anintegrated unit as shown in Fig. 7. Each of these units is suspended by a metal hanger 43 (Figs. 15, 16 and 17) which is adapted to form part of a built-up or sectional cantilever beam as disclosed in Fig. 1 in which view three complete beams are shown, each designated 44 as an entirety.

The fixed end of each of these beams is removably attached to an upstanding hook-like anchor portion of one of the one-piece cast metal hanger members 45' (Figs. 8 to 11) which is supported on the lower flange 41 of one of the overhead I-beams.

Each three-part unit suspended by a meta hanger member 43 forming part of a sectional cantilever beam 44 is hung ofi center as are the individual roof blocks in my said patents. From this it will be seen that each three part unit because of this off center hanging is biased toward one or the other side face of the group of four assembled integrated units located below and directly engaged by cast metal hanger members 46.

This group of units, therefore, forms an abutment for the refractories supported by each pair of opposed sectional cantilever beams. I

Hanger blOcks 3| for use with 3 inch thick roof blocks are preferably 3 inches square and about 8 /4 inches long. Each such block adjacent its top is provided with both longitudinal and transverse grooves or slots in opposite sides thereof to accommodate metal hanger members in my said patents for the purpose of facilitat= ing the placing of said hanger 43 in position on hanger block 3|.

The bottom of hanger block 3| is provided with two depending bead-like flanges 5fi55 which extend along opposite side edges thereof and are arranged to co-operate with or enter sub grooves 4| of the roof blocks 30. Pockets or side grooves 36 which are directly above flanges 55 are designed to receive the foreshortened ledges 40 of the two roof blocks 30 as such blocks are slid into position from opposite sides of the hanger block to the position shown in Fig. 7. Because of the fact that grooves or pockets 38 are reversely arranged, the end walls of the grooves on one hanger block 3| form closures for the open ends of grooves 36 in the abutting hanger blocks and thus prevent roof blocks 3ilfrom sliding out of interlocking position.

Metal hanger members Each of the one-piece cast metal hanger members 46 as above pointed out is adaptedto support four three-part units such asdisclosed in Fig. '7 and each comprises a body portion 5'1 which has a base member 58, end members 59 and a central member 60, which parallels end members 53 and is provided with an upstanding projection 6| adjacent to but spaced from its outer end as shown in Fig.8.

Extending inwardly from opposite ends of body 5'! are opposed arms it-32 which are adapted to extend above the lower flange 4'! of one of the overhead I-beams. Each arm 62 at its inner or free end is provided with a downwardly extending pad-like projection 63 which is adapted to bear on the top of the lower flange of such I-beam (Figs. 1 and 13). r I

Hanger member 46 can be positioned on such lower flange by tilting it (the hanger) to an unusual position then moving it so that one edge of such lower flange 41 of the I-beam enters the hanger opening between arms 62 and. until such entering edge is located within one end 64 or 65 as the case may be of the opening between body portion 51 and arms 62, at which time the opposite edge of flange 41 can be moved through such opening. Then the hanger member can be lowered until pad-like ends 63-53 rest on the upper surface of flange 41 of the I-beam. The

hanger member is then centered on such flange and the four hanger blocks 3| placed in position in such hanger member.

The two center hanger blocks 3| each with its two roof blocks assembled therewith are first placed in position within hanger member 45. This is done by so arranging such hanger blocks thatthe sides of such blocks which have grooves 5'2 and 54 therein face one another with central member 60 therebetween. The blocks are then moved into contact so that central member 63 lies within both grooves 54, and upwardly extending projection 6| lies within both grooves 52. r

The outer two of the four hanger blocks 35 each with one of its roof blocks secured thereto are next entered in the hanger member 16. This is done by placing them in'front of the hanger member with the side faces having grooves 54 and 52 therein facing outwardly or toward the ends of the hanger member and with grooves 54 in line with end members 53. members are then slid into place, end members 59 entering grooves 54. The other two roof blocks are then assembled with the two hanger'blocks.

This arrangement of the four hanger blocks within a hanger member 46 is clearly shown in Figs. 12 and 13.

With the outer hanger blocks 3| in place, the central hanger blocks are locked in position by such outer blocks and upstanding projection 6| of central member 60.

The body of hanger member 46 is preferably reinforced by reinforcing ribs 66 which extend transversely of the body below its ends and center and are preferably tapered as shown in Figs. 10 and 11. c From Figs. 12 and 13, it will be apparent that after the hanger blocks are inserted in position within metal hanger member 46, such hanger member is anchored to the I-beam. The clearance spaces between the edges of flange M of the I-beam and shoulders 31 on the under sides of arms 62 of hanger member 46 permit suflicient lateral adjustment of hanger member 45 relative to the I-beam to compensate for any crookedness of such I-beam and/ or thickness variations in the refractories.

In Fig. 2, I disclose six complete groups or bundles of units embodying this invention. Three of these are shown in side elevation in Fig. 1. Four of these groups of Fig. 2 are supported from the right-hand I-beam while two are supported from'the left-hand I-beam.

Since all the refractory roof blocks 3e are the same'there being no rights or leftsthe blocks at the junction of the two bundles below the web of the I-beam interlock as will be apparent from Fig. 20 which is a sectional view taken. on line XX-XX of Fig. 1 and embraces the major part of the roof blocks disclosed in Fig. 1. 4

Since theroof blocks 30 all have a triangular depression in one wide face and a corresponding projection on the opposite wide face, it follows that the opposite end of any two-block unit assembly made up wholly of blocks 30 would have The hanger- 7. a triangular projection and a triangular depression at each end. Since it is necessary to bridge the gap between the ends of adjacent bundles of roof blocks, I have produced shouldered blocks 33 one of which is illustrated in Fig. 18. These blocks each have two wide parallel faces which in the main are flat but each of which is provided with a triangular depression 63 which is of such size and shape as to be capable of receiving or containing one of the projections 35 of roof blocks 30.

Each block 33 is provided with a head portion 69 which increases the height of this block about one inch over the height of blocks 30. For about two thirds of the distance between the long sides of this block, this head portion projects laterally beyond the wide faces about one half inch on each side forming shoulders 10. All the edges of head 69 except the side edges of shoulders are chamfered as shown in Fig. 18. It will be seen that the narrow portion of head 69 lies immediately above the apices of the triangular depressions 38 which are similarly disposed in the long wide faces of these shouldered blocks. I 4

In order that the gaps or spaces between the ends of adjacent bundles or groups of roof blocks 30 may be filled by means of these shouldered blocks 33, I have produced a roof block 1| (Fig. 20) to take the place of one of the end blocks 30 at each end of each bundle. Blocks 30 that are thus displaced arethose that have their triangular depressions in the outer or end faces of the bundle.

Blocks 1| are exactly the same as blocks 30 except that instead of having a triangular depression on one side and a triangular projection on the opposite side, they have triangular projections on both side faces as disclosed in Fig. 20. It will be noted that blocks H are used at two diagonally positioned corners of each bundle in order to provide both ends of each bundle with a triangular projection double the area or size of the projections of roof blocks 30.

The construction and arrangement of shouldered gap sealing blocks 33 and the end blocks 30 and II of the bundles are such that when shoulders 1|] of blocks 33 rest on top of the end blocks of two adjacent bundles, the diagonal ledges formed by the junction of depressions 6B and the wide faces of such blocks 33 overlie the combined triangular projections of end blocks 3|) and 1|.

The spaces between the ends of the bundles and the adjacent furnace wall may be filled with blocks 33 using two such blocks for the ends of each bundle by supporting such blocks on one side by the blocks of the bundle and on the opposite side by the top of the furnace end or side wall as the case may be, or by a ledge projecting from such wall. In order to seal those portions of the joints between the end roof blocks of two adjacent aligned bundles not covered by shoulders 10 of blocks 33, I fill the openings provided by the chamfered or beveled edges of such blocks with suitable clay 12 (Fig. 2).

The spaces 13 (Figs. 2 and 3) between adjacent rows of bundles are preferably not over /8 of an inch wide and in order to fill and seal these, I use suitable clay.

Since the bundles are arranged incollateral courses, channels are produced between the-rows 8 that disclosed in my Patent 2,125,901. I also preferably fill the spaces between such blocks or slabs and hanger blocks 3| with plastic refractory material as disclosed in such patent.

I prefer to use wide flange I-beams as shown in the drawings for the support beams since the inner surfaces of the flanges of such beams are fiat and make the lateral shifting or adjustment of hanger members 46 with their load easier than when using beams having tapered flanges.

In case it is desirable to join together the outer ends of adjacent bundles for the purpose of alignment and stabilization, I prefer to use my tie member 32 disclosed in Fig. 19. This preferably comprises a malleable casting provided with spaced horns l4 and spaced legs 75 braced by a stiffening web 76. In utilizing tie member 32, horns 14-'l4 are hooked under and around shanks ll of the hook 18 of the end hangers 43 of adjacent bundles. Tie member 32 is then tilted down until in vertical position with legs 75 in contact with hanger blocks 3| suspended by hanger members 43 as disclosed in Figs. 1 and 2. shouldered blocks 33, which bridge the gaps between the ends of adjacent bundles, co-operate with members 32 in stabilizing the roof structure and particularly the ends of adjacent bundles of refractories.

Modifications In Figs. 21 and 22, I disclose another form of one-piece cast metal hanger which can be used for supporting the oppositely extending sectional cantilever beams disclosed in Figs. 1 and 2. This hanger member is not adapted to support hanger blocks 3|, but requires a special ceramic hanger block.

One of these special blocks is disclosed in'Fig. 23 and an assembly of such blocks with four roof bloclrs 30 is disclosed in Fig. 24. Use of this special hanger block with the form of one-piece hanger shown in Figs. 21 and 22 is disclosed in Figs. 25 to 28 inclusive.

The one-piece cast metal hanger of Figs. 21 and 22 resembles hanger 46 in that it is provided with arms 19 that extend upwardly and inwardly from the ends of its body toward one another and are provided with contact pads at the inner or free ends of such arms for bearing on the upper surface of the lower flange of the I-beam. This hanger can be placed on the lower flange of an I-beam in the same manner as described in connection with hanger 46 and can also be adjusted laterally of such flange.

Its body portion is provided with two oppositely opening pockets each designed to receive one spec1al refractory hanger block and each such pocket is bounded on three sides by a horizontal flange 80. This block which is numbered 8| as above mentioned is disclosed by itself in Fig: 23 and in combination with four roof blocks 30 in Fig. 24.

This block 8| has a head portion 82 which is rectangular in cross section as is the body of such bloclr and is connected to the body by a neck portion formed by a groove 83 which surrounds three sides of the block. When the head portion 82 of such block is placed within one of the pockets of this hanger member, with its side 84 facing outwardly of such pocket, flange 8|] will lie within groove 83 and surround three sides of the block.

The bottom of hanger block 8| is r with downwardly extending bead-like filing: along its opposite long edges similar to flanges 56 9 of hanger block 3| and these are adapted to cooperate with the grooves in roof blocks 30 in the same manner as flanges 56. The lower portion of this hanger block is provided with oppositely positioned grooves 85 and 86 for receiving ledges 39 of four roof blocks 30 as disclosed in Fig, 24. Groove 85 extends throughout the full width of the hanger block while groove 86 terminates short of end 81 of such block so that ledges 39 of two of the roof blocks of the assembled group shown in Fig. 24 have to be entered into groove 86 from the opposite end of the block from end 81.

This application is a continuation in part of a copending application filed by me on October 27, 1947, Serial No. 782,339, which application has now become abandoned.

What I claim is:

1. A refractory unit for use in constructing furnace roofs, comprising an elongated ceramic hanger member of substantially square cross section and two roof blocks interlocked therewith and each having two wide and two narrow sides; such hanger member adjacent its lower end having pockets in two of its opposed long sides; each such pocket having an open end which is located in one of the other long sides of the hanger member, each roof block having a ledge formed in one of its narrow sides adjacent its top, such hanger member on its lower end and paralleling the planes of its pocketed long sides having two spaced parallel downwardly extending bead-like flanges; each roof block below and in the same narrow side in which its ledge'is located having an open top groove which parallels the bead-like flanges of the hanger member and extends from one of its wide sides to its other wide side; the ledge of each roof block being adapted to slide into one of the hanger member pockets through its open end as one of the bead-like flanges of the hanger member is slid lengthwise into the open top groove located below such ledge.

2. A refractory unit for use in constructing furnace roofs, comprising an elongated ceramic hanger member of generally rectangular form and two roof blocks interlocked therewith and each having two wide and two narrow sides, such hanger member adjacent its lower end having pockets in two of its opposed long sides; each such pocket having an open end which is located in one of the other long sides of the hanger member; such hanger member on its lower end below such pockets and paralleling the planes of such pocketed long sides havin a pair of spaced parallel downwardly extending bead-like flanges; each roof block adjacent its upper end being formed with an open top groove in one narrow side thereof which parallels the bead-like flanges of the hanger member and having a ledge above such groove adapted to slide into one of the said hanger member pockets through its open end as such bead-like flange is slid lengthwise to position within one such groove.

3. A refractory unit for use in constructing having a pair of spaced parallel downwardly extending bead-like edgeflanges; each such roof block in a narrow side thereof adjacent its upper end being formed with an open top groove which parallels the bead-like flanges of the hanger member and extends from one of its wide'sides to the other wide side for slidinglyreceiving one such bead-like flange andzhaving a ledge above such groove adapted to Slide. lengthwise into one of the hanger member pockets through its open end as such bead-like flange is slid lengthwise to position within such groove.

4. A ceramic hanger member designed to support two furnace roof blocks each having two wide and two narrow sides, such hanger member comprising an elongated refractory block which in the main is square in cross section, and which adjacent the lower end of each of two of its opposed long sides isprovided with a pocket having at least one open end which is located in one of the other long sides of the hanger member and on its lower end below such pockets is provided with a pair of spaced downwardly eX- tending parallel bead-like flanges which parallel the planes of its pocketed long' sides and serve as downward extensions of suchlong sides.

5. A ceramic hanger member designed to support two furnace roof blocks each having two wide and two narrow sides, such hanger member comprising an elongated refractory block which in the main is rectangular and whichadjacent the lower end of each'of two of its opposed long sides is provided with a pocket having an open end; the open ends of such pockets facing in opposite directions and being located in the other opposed long sides of the hanger member in order to slidingly receive from opposite directions ledge-like portions formed in one of the narrow sides of such roofblocks; such hanger member on its lower end below such pockets bee ing provided with a pair of spaced downwardly extending parallel bead-like flanges which parallel the planes of said pocketed long sides; each such bead-like flange being arranged to slide.

lengthwise into an open top groove which parallels such bead-like flanges and is formed in one narrow side of one of such roof blocks as'the ledge-like portion of such roof block which overhangs such open top groove is slid lengthwise into one of such hanger member pockets through its open end.

6. The combination with a horizontally extending I-beam in which the lower flange thereof is provided with flat upper surfaces on opposite sides of the beam web, of ametal hanger member having opposed arms which embrace such flange and which, adjacent their free ends, are provided with downwardly extending pad-like projections which bear on the top surface of such flange and hold such arms above and in spaced relation;

ber mounted on and shiftable laterally of the lower flange of such bea n;such'hangenmemher having anchor portions adjacent its opposite ends, having pockets, the walls of which are provided with means for engaging the walls of grooves of V 11 ceramic hanger blocks, ceramic hanger block located within such pocketsia'nd having groove walls engaged by such means, refractory roof blocks engaged by and depending from such hanger blocks, sectional cantilever beams extending in opposite directions from such I-beam and having their fixed ends removably attached to such anchor portions, a ceramic hanger block engaged by and depending from each section of such cantilever beams and refractory roof blocks engaged by and depending from each such hanger block. o

8. The combination with an overhead I-beam having wide flat flanges, of a metal hanger member having arms positioned above the lower flange of such beam and being formed with means rest: n ion the upper surface of such lower flange for holding such arms above andout of contact with such flange exceptior such means to facilitate the-shifting of such hanger member laterally of such beam such hanger member having anchor portions adjacent its opposite ends and pockets, the wallsof which are provided with means for engagingfgrooves of four ceramic hanger blocks, fourceramic hanger blocks located within such pockets and havinggroove walls engaged by such means, refractory roof blocks engaged by and depending from such hanger blocks, sectional cantilever beams extendingin opposite directions from such I-beamand having their fixed ends removably attaehed to such anchor portions, a ceramic hanger block engaged by and depending from each section ofsuch cantilever beams and refractory roof blocks engaged by and depending from e su hen b e k- 9. The combination with anoverhead I-beam having vv ide flat flanges, of a metal hanger memher having arms positionedabove the lower flange of such bea'rnan d being formed with means resting on the upper surface of such lower flange for holding such arms above and out of contact with such flange "except for such means to facilitate the'sh'ifting of such hanger member laterally of such'beam; such hanger member having anchor portions adjacent its oppositeends and pockets, the walls of which are provided with means for engaging walls of grooves of ceramic hanger blocks, ceramichangerblocks located within such poketsand having grooyewalls engaged by such means; refractory roof blocks'engaged by anddepending emsuehhanger bl'ookssectional cantilever beams extending in opposite directions from such I-beam and having their fixed ends removably attached to such anchor portions, a ceramic hanger block engaged by and depending from each section of such cantilever beams and refractory roof blocks engaged by and depending from each such hanger block.

10. The combination with an overhead I-beam having wide flat flanges, of a metal hanger member having arms positioned above the lower flange of such beam and being formed with downwardly extending pad-like members resting on the upper surface of such lower flange for holding such hanger member arms above and out of contact with such flange except for such pad-like members to facilitate the shifting of such hanger member laterally of such beam; such hanger member having anchor portions adjacent its opposite ends and two pockets, the walls of which are provided with means for engaging grooves of ceramic hanger blocks, ceramic hanger blocks located within such pockets and having grooves having walls engaged by such means, refractory roof blocks engaged by and depending from such hanger blocks, sectional cantilever beams extending in opposite directionsfrom such'I-beam and having their fixed ends rem'ovabl'y attached to such anchor portions, a ceramic hanger block engaged by and depending from each section of such cantilever beams and refractory roof blocks engaged by and depending from each such hanger block. i

11. The combination with an overhead I=beam, of a metal hanger mounted on and shiftable laterally of the lower flange of such beam, having anchor portions adjacent opposite ends thereof and pockets adjacent its bottomfor receiving two ceramic hanger blocks, two ceramic hanger'blocks having portions thereof located -within such pockets, refractory roof blocks; engaged by and depending from such ceramic hanger bloc-ks, cantilever beams extending in opposite directions from such I-beam and having their fixed ends removablyattached to such anchor portions, a plurality of ceramichanger blocks carried by and depending from such cantilever beams and refractory roof blocks engaged by and depending from such ceramic hanger blocks. 7

12. The combination with an overhead I-beam, of a metal hanger mounted on and shiftablelaterally of the lower flange of such beam, having anchor portions adjacent opposite ends thereof, havingmeans for limiting lateral movement between it and such flange and having pockets adjacent its bottom for receiving two ceramic hanger blocks, two ceramic hanger blocks having parts thereof located within such pockets, four refractory roof blocks engagedby and depending from such ceramic hanger block-s, cantilever beams extending opposite directions from such I-beam and having their fixed-ends removably attached to such anchor portions, a plurality of ceramic hanger blocks carried by and depending from such cantilever beams and refractory roof blocks engaged by and depending from such ceramic hanger blocks.

13. The combination with an overhead Leeann, of ;a one-piece metal hanger mounted on and shiftable laterally of the lower flange of such beam, having anchor portions adjacent opposite ends thereof and pockets adjacent its bottom for receiving two ceramieinanger blocks, two "ceramic hanger blocks having parts-located within such pockets, four refractory roar blocks engaged 'by and dep'endin'g-frbm such ceramic hanger "blocks, cantilever beanis extending opposite. directions from such I-fbain and ihavihg'fthelr fixed ends removably attached to ".s'u'ch'fianchor portions, a pluralityv of ceramic nanger'bibcks carried by and depending-from such cantilever beams and refractory roofblocks engaged by and depending from such ceramic hanger blocks.

'14. The combination with a horizontal l beam, of a one-p'iecel'rn'etal hanger embracing the lower flange of such beam'ana shiftable laterally thereof; such hangerhavihg 'anchcnpornons 'ait'i'ts opposite ends above such-flange and below such flange having two op'po'si'tely openingfpiockets arranged side by side "for 'receivingpa'rts of "two ceramic hanger block's, 'Iportions of two "ceramic hanger blocks/located "within vandfidep'end'ing below siich pocliets'two ca'fitileverbeains extend ing in opposite directions from such I-beam and having their 'fix'ed ends'removablyfattached'to such anchor-portions, ceramic'hanger blocks carried bysuch cantilever beams, and a'. 'plurali'tylof refractory roof blocks 'iriterengagee-ny andIdepending from-each ceramic hanger block.

,"The combination withianioverhead I b'ea'm '13 having wide flat flanges, of a cast metal hanger member having a body portion, end portions oflset from such body portion, arms extending inwardly from such end portions for embracing the lower flange of such beam and at their free ends being provided with downwardly extending pad-like members for resting on the upper-surface of such flange and for spacing such arms, except for such pad-like members, above such flange, a central member extending from thebottom portion of such body and with such end members forming two pockets on the sameside of such body portion, such end members and such central member having means for engaging the walls of grooves of ceramic hanger blocks, ceramic hanger blocks located within such pockets andhaving groove walls engaged by such means, and refractory roof blocks. engaged by and depending from such hanger blocks. I

16. The combination with an overhead I-beam having wide flat flanges, of a, cast metal hanger member having a bod portion, end portions offset from such body portion, arms extending inwardly from such end portions for embracing the walls of grooves of four ceramic hanger blocks,

7 four ceramic hanger blocks located within such such flange, a central member extending from the 3 bottom portion of such body, and with such and members, forming two pockets on the same side of such body portion; such end members and pockets and having groove walls engaged by such means, and refractory roof blocks engaged by and depending from such hanger blocks.

1'7. The combination with an overhead I-beam having wide flat flanges, of a cast metal hanger member having a body portion, end portions ofiset from such body portion, arms extending inwardly from such end portions embracing the lower flange of such beam and at their free ends being provided with downwardly extending padlike members resting on the upper surface of such flange and spacing such arms, except for such pad-like members, above and out of contact with such flange, a central member extending from the bottom portion of such body and with such end members forming two pockets on the same side of such body portion; such end members and such central member having means for engaging walls of grooves of four ceramic hanger blocks.

LEVI S. LONGENECKER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,529,242 Downey Mar. 10, 1925 1,544,154 Hosbein June 30, 1925 2,126,901 Longenecker Aug. 16, 1938 2,294,108 Beecher 1 Aug. 25, 1942 2,387,663 Hosbein Oct. 23, 1945 

